Device for loosening well-drills



(No Model.)

Pp AUSTIN. DEVICE FOR LO'OSENING WELL DRILLS'.

No. 594,772. Patent-ed N0v .30,1897.

NITED STATES FREDERICK AUSTIN, OF CENTRE POINT, IOWVA.

DEVICE FORLOOSE NlNG WELL-DRILLS.

SPECIFICATION forming part of Letters Patent No. 594,772, dated November30, 1897.

Application filed August 21, 1896 To on whom, it may concern:

Be it known that I, FREDERICK AUSTIN, of Centre Point, Linn county,Iowa, have invented certain new and useful Improvements in Devices forLoosening VVell-Drills That May Become Fast in the Drill-Hole While inOperation, of which the following is a specification.

This invention relates to well-drilling machinery; and the object of theinvention is to provide simple and efficient means for loosening thedrill when it becomes accidentally stuck in the hole. A device for thispurpose will be fully hereinafter described and claimed, referencebeinghad to the accompanying drawings, forming a part of thisspecification, in which- Figure 1 is a side view of a device embody--ing the invention as applied to a well-drill. Fig. 2 is a similar viewof the same, detached. Fig. 3 is a view of the same in perspective,showing the head thereof opened for the insertion of the'drill-rope.Fig. 4 is a top View of the same. Fig. 5 is a coupling connecting thetubular shank of the device with a section of wooden rod.

Similar letters of reference indicate corresponding parts.

In the drilling of deep wells a frequent source of tedious labor andexpense is the sticking of the drill in the hole. This is often due tothe wedging of a piece of rock over the flaring bit of the drill such asto resist all ordinary means for extracting the drill. My invention isdesigned to obviate the difficulty very largely by the employment of adevice adapted to jar the drill loose in connection with strain upon thedrill rope or shank.

Referring to the drawings, A designates the upper end of the drill-rod,to which is usually connected a rope B. The drill-bit (not shown) issupposed to be some distance below. I

The apparatus for loosening the drill consists in a rather heavy head C,of iron or steel, provided with an upwardly-extending shank 0, adaptedto connect with sections of small tubing D or the like. Enough of thesesections are connected with the head to give it the requisite weight,and if greater length Serial No. 603,538. (No model.)

is required to carry the shank to the top of the hole sect-ions ofwooden rod E are preferably added, the connections of the parts being inany well-known way. At the upper end of the series of sections is aturnbuckle F, to connectwith a rope for hoisting and lowering the devicein the operation of putting it together and letting it down or taking itout of the well.

For convenience in applying the device to the drill-rope the head ismade in two parts hinged together at one side, with interlocking jaws onthe other side, with a hole C provided with a suitable fastening bolt orpin 0 It is to be understood that the hole in the head is large enoughto allow the head to slide freely up and down on the drill-rope, whichserves as a guide for it.

The operation of the device is as follows: Tension is applied to thedrill-rope by means of the hoisting mechanism above, and while thisstrain is on the rope an operator, by hand, raises the jarring apparatusand lets it fall forcibly on the upper end of the drill-rod. This heavyblow stretches the drill rope slightly, loosening the drill downwardly,and the tension of the rope on the recoil draws the drill up again withequalenergy. 'The tension is gradually increased, and the vibratorymotion imparted to the drill by the joint action of the blows andtension soon loosens or breaks the obstruction, when the drill may bedrawn out of the hole or drilling resumed at pleasure.

It is evident that a rope might be used instead of the sections ofwooden rod to raise the head; but to avoid the possibility of a ropewinding around the drill-rope and making trouble rods are preferred.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The herein-described apparatus for loosening well-drills, consistingof the drill-rope encircling said rope and adapted to strike the upperend of the drill when dropped, and upwardly-extending sections of rod ortubing connecting with said head, whereby the same may be raised anddropped, as described.

and means for drawing the same taut, a head 5 2. In a device forloosening well-drills, the combination with the main drill-rope andmeans for drawing the same taut, of a separable head adapted to encirclethe drill-rope when cl0sed,suitable fastenings for the halves thereof,and one or more upwardly-extending sections of rod or tubing connectedto one of the halves of said head, whereby the head may be lift-ed anddropped, substantially as set forth.

FREDERICK AUSTIN. Vitnesses:

H. O. PRINTY, D. E. TIFFANY.

